Compaction Control of Crushed Concrete and Recycled Asphalt Pavement using Nuclear Gauge
Publication: Geotechnical Engineering for Transportation Projects
Abstract
Crushed concrete (CC) and recycled asphalt pavement (RAP) are sometimes used as substitute fill material in retaining wall and pavement applications. The accuracy of the nuclear gauge device for density and moisture content measurements on these two recycled materials may be unreliable, due to their chemical compositions being different than typical earth fill. An experimental study was initiated to compare moist density and water content measured from the nuclear gauge with those from traditional rubber balloon and test pit methods. Test results show that the nuclear gauge consistently measured larger moist densities than the rubber balloon method for all materials tested. However, the discrepancies were most likely due to the inadequate size of the hole used in the rubber balloon test relative to the maximum particle size of the materials. This result was confirmed with test pit measurements, which showed closer correspondence with the nuclear gauge results. Water content measurements indicate that the nuclear gauge reports larger values of moisture content than oven drying for CC and RAP. This difference can be attributed to the misinterpretation by the nuclear gauge of inherit hydrogen atoms in CC and RAP as water molecules.
Get full access to this chapter
View all available purchase options and get full access to this chapter.
Information & Authors
Information
Published In
Copyright
© 2004 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Asphalt concrete
- Asphalt pavements
- Compaction (material)
- Composite materials
- Concrete pavements
- Engineering fundamentals
- Engineering materials (by type)
- Fiber reinforced composites
- Hydrologic engineering
- Hydrologic properties
- Hydrology
- Infrastructure
- Material tests
- Materials characterization
- Materials engineering
- Pavements
- Recycling
- Tests (by type)
- Transportation engineering
- Water and water resources
- Water content
- Water management
- Water meters
- Water supply
- Water supply systems
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.